Manufacture of cylindrical castings and the like



Jul 31,1928. 1 1,679,217?

A. J. HOAGLIND IANUFACTURE OF CYLINDRI CAL CASTINGS AND THE LIKE Filed Feb. 16, 1924 4 Shets-Shet l K A O'RNEY July 31, 1928 A. J. HOAGLIND IANUPAOTURE 0F CYLINDRICAL CASTINGS AND THE LIKE Filed Feb. 16, 1924 4 Sheets-Sheet 2 INVENTOR Mat W B! AfibRNEY Ill/1 July 31, 1928.

A. J. HOA GLIND IANUFACTURE 0F CYLINDRICAL GAS'IINGS AND THE LIKE- 4 Sheets-Sheet 3 Filed Feb. 16. 1924 INVENTOR I BY a M M.

ATTOIRNEY July 31, 1928. 1,679,217

A. J. HOAGLIND IANUFACTURE OF CYLINDRICAL CASTINGS AND THE LIKE Filed Feb. 16, 1924 4 Sheets-Sheet 4 INVENTOR iTORNEY Patented July 31, 1928.

UNITED STATES PATENT OFFICE.

ALBERT JOHN HOAGLIND, VILLA PAR-K, ILLINOIS, ASSIGNOR T NATIONAL MALLEABLE AND STEEL CASTINGS COMPANY, OF CLEVELAND, OHIO, A CORPORA- TION or or'rro.

MANUFACTURE OF CYLINDRICAL OASTINGS AND THE LIKE.

Application filed February is, 1924. Serial No. 693,176.

Fig. 1 is a plan of two hub half-patterns mounted on a shaft for rotation through a plate, with a flask in place ready for the sand; Fig. 2 is a vertical longitudinal section v 5 thereof on the line II--II of Fig. 1, with their respective flasks and in assembled relation to form the complete mold with the core in place, the latter being shown partly in elevation; Fig, 9 is a horizontal detail section thereof on the line IX-IX of Fig.

' 8; Fig. 10 is a plan of the completed casting with the sprue attached, as delivered from the mold, a portion being shown in section; Fig. 11 is a cross section of same on the line XI-XI of Fig. 10; Fig. 12 is a section somewhat similar to Fig. 2 but of a modified form of the invention in which but a single pattern is shown of different configuration; Fig. 13 is a cross section thereof on the line XIII-XIII of'Fig. 12; Fig. 14 is a side elevation, partly in section, of the product of a pair of molds of the type shown in Fig. 12; and Fig. 15 is an end elevation of Fig. 14.

My invention relates to the casting of cylindrical or similar shapes and comprises an arrangement of patterns and prints by which molds may be formed with extreme rapidity, the tendency of the castings to shrinkage defects is materially lessened, and

one or more of the machining operations on the completed casting is eliminated. My invention also comprises the various features which I shall hereinafter describe and claim. Referring to the drawings, in which I have shown my invention applied to the manufacture of wheel hubs of an automobile,

2 indicates a bed plate with a flask 3 thereon, removably attached to the plate and held in position thereon by the dowels 3 Preferably mounted on the plate 2 are two hub half patterns 4 arranged along a shaft 5 which rotates in the bearings 6 in the ends of the plate 2. Attached to an end of the shaft 5 is a handle 7 by which the shaft and marking thereon.

the patterns 4 upon it may be rotated to the extent provided between the stops 8 with which a projection 9 on the shaft is arranged to come into contact at the limits of the rotative movement, here shown at. 180. Also arranged on the shaft 5 are an intermediate core print 10 between the identically formed and oppositely facing hub half patterns 4 and the core prints 11 at the outer ends of the patterns 4. The core prints 11 have en-' largements 12 intended to form recesses in the mold for reception of similar enlargements on the core which serve to locate the core accurately in the mold.

The plate 2 is cut out to follow the contour .of the patterns 4 and prints 10 and 11, allowing only sufficient clearance to permit them to be rotated through the plate, as is shown in Figs. 1, 4 and 7.

The exterior vfaces of the patterns 4 and core prints 10 and 11 are cylindrical in form and extend slightly below the axis of the shaft and th upper face of the plate 2 to prevent sand from working under the edges 4 of the pattern 4 and thereby leaking through the'plate 2, as is shown in Fig. 7. The edges 4 of patterns and prints are slightly bevelled to prevent interference with the edges of the cut out portions of the plate.

To permit casting an article with a name or other marking thereon I have provided a.

semi-circular band or hands 13 having thedesired marking thereon, .which I have indicated as the marking A B. The bands 13 seat in recesses 14 in the patterns 4, as indicated in Fig. 3, and the ends 15 of the bands are secured to the plate 2, as indicated .in

Fig.5. The bands 13 are stationary when the patterns are revolved. and hence the marking, such as A B, will not be rubbed off by the rotation of the patterns 4. Where it is desired to have the marking appear only once on the finished casting this may be accomplished either by eliminating a band or by having a band without any mark. A half mold may then be turned end for end and placed on a l already formed half mold, with the result that as each half mold has one marking, and when as shown twin products result, each article will have only the one molds shown herein it is commonly necessary to machine certain of the surfaces of the castings such as the vertical face 16 of the flange 17, the horizontal face 18 and the connecting fillet. To eliminate the necessity of machining out the fillet connecting the faces 16 and 18, the pattern has a recess 19 extending from the vertical face 16 to the horizontal face 18, and the counterpart of this recess 19 will .be formed in the finishedcasting, as is indicated in Fig. 10, in which it will be necessary to machine only the surfaces corresponding to the surfaces 16 and 18, but not the fillet between such surfaces, since in the molding and casting operations the fillet has been formed into a recess 19.

2, sand is rammed into the flask and about the patterns 4 and core prints 10 and 11 and struck off flush with the top 3 of the flask 3, as is shown in Fig. 2. The shaft is then rotated through 180, and as the exterior surfaces of the patterns 4: and core prints 10 and 11 are cylindrical, this movement'is eflected without disturbing the impressions in the sand, even the undercut portion of the recess 19 rotating clear of the sand. At the end of such movement the patterns 4 and prints 10 and 11 are all free from the molded sand, as is shown in Fig. 3. As the bands 13 are stationary during the rotation of prints and patterns, the marking formed by the bands and impressed on the sand is not disturbed by such movement. The flask 3 with the sand containing the pattern and core print impressions is then lifted from the plate, thus forming a half mold for the casting.

The core is then placed in position in the mold with its centering PIOjBCtlOIlS or enlargements 12 seating in the complementary impressions in the sand. The other half of the mold, which has been formed in a manner identical with the first half, is then applied on the top of the previously formed mold, and after a runner or feeder has been cut, preferably between the two hub or other impressions, the mold is ready for pouring, as is shown in Figs. 8 and 9.

In Figs. 12, 13, 14 and 15 I have shown my invention applied to the formation of molds for a castin having an undercut flange 21 and a plurahty of splines 22 at the end of a sleeve 23. In producing such a casting, a cylindrical half pattern substantially like one of those described in connection with Figs. 1 to 11, inclusive, is employed. To form the splines 22 a stationary member 24 is attached to the plate having the projections 25 and 26 thereon. The projection 25 forms a full impression for one of the splines in the molded sand and the projections 26 form half impressions for two other splines. By similarly forming another half mold the mold is completed.

I have found that the use of multiple pattern parts in the simultaneous production of similarly formed molds intended to be used in the quantity production of cylindrical or semi-cylindrical castings is extremely valuable. It will be seen that any desired number of pattern parts can be placed along a shaft or under the control of a single operating lever. My invention is of further advantage in that it requires the use of no core parts other than the usual central core.

The terms and expressions which I have employed are used as terms of description and not of limitation, and I have no intention, in the use of such terms and expressions, of excluding any equivalents of the features shown and described, or portions thereof, but recognize that various modifications are possible within the scope of the invention claimed.

WhatI claim is:

1. Apparatus for forming cylindrical impressions in sand, which comprises a bed plate having a shaft -extending longitudi nally therethrough, pattern parts of cylindrical shape arranged along the shaft, the bed plate having an aperture conforming to the longitudinal cross sectional shape of the patterns, a pattern part immovable with regard to the plate carrying marking characters arranged to impart marking impressions to the sand, a flask mounted on the plate, the pattern parts on the shaft arranged on actuation by the shaft to be rotated out of the flask and below the face of the bed plate to free the pattern from the corresponding impressions in the sand formed by the patternsand the plate carrying marking 1 characters being freed from its impressions by a movement of translation.

2, Apparatus for forming cylindrical impressions in sand, which comprises a bed plate havin a shaft extending longitudinally theret rough, pattern parts of cylindrical shape arranged along the shaft, the bed plate having an aperture conforming to the longitudinal cross sectional shape of the patterns, a flask mounted on the plate, the pattern'parts having undercut portions, the pattern parts on actuation by the shaft be ing arranged to be rotated out of the flask and below the face of the bed plate to free the pattern from the corresponding impressions in the sand formed by the patterns, the

lower edges of the patterns when in molding position extending below the upper face of ongitudina drical shape arranged along the shaft, the bed late havin an aperture conforming to the cross sectional shape of the patterns, a flask mounted on the plate, the

pattern parts having undercut portions, the pattern (parts on actuation by the shaft being arrange tobe rotated out of the flask and below the face-of the bed late to free the attern from the correspon ing impressions 1n the sand formed by the patterns, the lower edges of the patterns when in molding position extending below the upper face of the plate to prevent sand from working between plate and patterns and the said edges being bevelled to ensure entry into the aperture in the bed plate.

4. Apparatus for forming mold sections for casting metal hubs for vehicles which comprises a bed plate havin a shaft extending longitudinally. theret rough, pattern parts of cylindrical sha arranged along the shaft, the bed plate aving an aperture conforming to the longitudinal cross-sectional shape of the patterns, a flask mounted on the plate, the pattern parts having underthe patterns.

cut surfaces at theintersection of angled faces on such patterns whereby tool clearance is provided for machining correspondingly angled faces on the resulting hub structure, the pattern parts on actuation by the shaft' being arranged to be rotated out vof the flask and below the face of the bed plate to free the patterns from the corresponding impressions in the sand formed by 5. Ap aratus for forming mold sections for casting metal hubs for vehicles which comprises a bed plate, a rotatable shaft mounted thereon and extending longitudinally therethrou h, pattern parts a along the shaft having exterior c lindrical' portions struck about the longitu inal axis of the shaft some of which have undercut surfaces and some of which have marking characters thereon, certain of said 0 lindrical portions, including those which ave undercut surfaces, bein rotatable to free them from the sand mo d section, others of said cylindrical portions, including those which have marking characters thereon, be-

ing angularly movable in a plane passing throu h the axis of the sand mold section to free t em from the said section without disturbing the marking impressionsin the said section.

ALBERT JOHN HOAGLIND; 

